LED-based light with canted outer walls

• US 10,161,568 B2
• Filed: 08/14/2015
• Issued: 12/25/2018
• Est. Priority Date: 06/01/2015
• Status: Active Grant

• Current Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Original Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Inventors: Amrine, Jr., James M., Ivey, John
• Primary Examiner(s): Bannan, Julie
• Application Number:
  US14/826,505
• Publication Number:
  US 20160348851A1
• Time in Patent Office: 1,229 Days
• Field of Search: 362219, 362225, 36221701-21717
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21K 9/278 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21K 9/66 Details of globes or covers forming part of the light source
• CPC Class Codes: F21V 17/104 using feather joints, e.g. tongues and grooves, with or without friction
• CPC Class Codes: F21V 19/003 Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
• CPC Class Codes: F21V 19/0045 by tongue and groove connections, e.g. dovetail interlocking means fixed by sliding
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 23/023 Power supplies in a casing F21V23/003 takes precedence
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED-based light has an elongate housing having a longitudinal axis and a vertical axis, the housing defined by a base and two canted outer walls meeting opposite the base, the housing defining a cavity. An LED circuit board on which a plurality of LEDs are located is positioned within the cavity. End caps are positioned at opposite ends of the housing.

Claims

1. An LED-based light comprising:

an elongate housing having longitudinal axis and a vertical axis orthogonal to the longitudinal axis, the housing defining an outer periphery of the LED-based light and a cavity,

wherein the housing is defined by a base, a first canted outer wall, and a second canted outer wall,

wherein each of the base, the first canted outer wall, and the second canted outer wall defines a substantially identical arced profile, and

wherein the base, the first canted outer wall, and the second canted outer wall substantially form a triangle;

an LED circuit board on which a plurality of LEDs are located, the LED circuit board positioned within the cavity, wherein the LED circuit board faces an apex of the triangle; and

end caps positioned at opposite ends of the housing, wherein each end cap comprises a respective bi-pin connector protruding from the end cap, the bi-pin connectors being compatible with a fluorescent light fixture.

2. The LED-based light of claim 1, wherein the first canted outer wall and the second canted outer wall are formed of a light transmitting material and are configured to maximize an illuminated section of the housing that faces horizontal.

3. The LED-based light of claim 1, wherein the first canted outer wall defines a first profile extending from a top of the first canted outer wall to a point of intersection between the first canted outer wall and the base,

wherein the first profile comprises a first section extending between a first point and a second point, wherein the first point is defined by a first line tangent to the housing and at a 45°

angle from a horizontal line, and wherein the second point defined by a second line tangent to the housing and at a 90°

angle from the horizontal line, and

wherein the first section is at least 30 percent of the first profile.

4. The LED-based light of claim 1, wherein the LED circuit board is positioned on an interior surface of the base of the housing.

5. The LED-based light of claim 1, wherein the LED circuit board is mounted in the housing in an area having other than a greatest width of the cavity.

6. The LED-based light of claim 1, further comprising a support which creates a bipartite configuration which splits the cavity into a first cavity and a second cavity.

7. The LED-based light of claim 6, wherein the LED circuit board is supported by the support in the first cavity.

8. The LED-based light of claim 7, further comprising a power supply circuit board positioned in the second cavity and supported by the support.

9. The LED-based light of claim 6, wherein the greatest width of the housing is in the second cavity.

10. The LED-based light of claim 6, wherein the support comprises a planar portion and opposed sidewalls extending away from the planar portion of the support.

11. The LED-based light of claim 1, wherein the end caps have an open end to receive the housing and a closed end, at least one of the closed end of the end caps having a tapered surface tapering toward the open end.

12. The LED-based light of claim 11, wherein the tapered surface tapers toward the open end at a corner opposite the base of the housing.

19. The LED-based light of claim 1, wherein at least one end cap comprises:

an open end to receive the housing, and

a surface opposite the open end,

wherein at least one of the bi-pin connectors protrudes from the surface, and

wherein the surface tapers with respect to the longitudinal axis.

22. The LED based light of claim 1, wherein a profile of the base and a profile of first canted outer wall intersect at a first point, the profile of first canted outer wall and a profile of the second canted outer wall intersect at a second point, and the profile of the second canted outer wall and the profile of the base intersect at a third point, and

wherein the first point, and second point, and the third point correspond to vertices of a substantially equilateral triangle.

13. An LED-based light comprising:

an elongate housing defining an outer periphery of the LED-based light and a cavity, the housing comprising;

a base extending substantially along a horizontal,

a first canted outer wall extending from the base, and

a second canted outer wall extending from the base,

wherein the first canted outer wall and the second canted outer wall cant toward each other, and

wherein each of the base, the first canted outer wall, and the second canted outer wall defines a substantially identical arced profile;

an LED circuit board on which a plurality of LEDs are located, the LED circuit board positioned within the cavity, wherein the LED circuit board faces a line of intersection between the first canted outer wall and the second canted outer wall; and

an end cap at each end of the housing, wherein each end cap comprises a respective bi-pin connector protruding from the end cap, the bi-pin connectors being compatible with a fluorescent light fixture,

wherein the first canted outer wall of the two canted outer walls defines a first profile extending from a top of the first canted outer wall to a point of intersection between the first canted outer wall and the base,

wherein the first profile comprises a first section extending between a first point and a second point, wherein the first point is defined by a first line tangent to the housing and at a 45°

angle from a horizontal line, and wherein the second point defined by a second line tangent to the housing and at a 90°

angle from the horizontal line, and

wherein the first section is at least 30 percent of the first profile.

14. The LED-based light of claim 13, wherein the first canted outer wall and the second canted outer wall are formed of a light transmitting material and configured to maximize an illuminated section of the housing that faces the horizontal line.

15. The LED-based light of claim 13, wherein the LED circuit board is positioned on an interior surface of the base of the housing.

16. The LED-based light of claim 13, wherein the LED circuit board is mounted in the housing in an area having other than a greatest width of the cavity.

17. The LED-based light of claim 13, wherein each end cap has an open end to receive the housing and a closed end, the closed end supporting at least one connector, the closed end having a tapered surface tapering toward the open end, the tapered surface capable of unobstructed insertion into a lighting fixture.

18. An LED-based light comprising:

an elongate housing having longitudinal axis and a vertical axis orthogonal to the longitudinal axis, the housing defining an outer periphery of the LED-based light and cavity,

wherein the housing is defined by a base, a first canted outer wall, and a second canted outer wall, and

wherein each of the base, the first canted outer wall, and the second canted outer wall defines a substantially identical arced profile,

an LED circuit board on which a plurality of LEDs are located, the LED circuit board positioned within the cavity, wherein the LED circuit board faces a line of intersection between the first canted outer wall and the second canted outer wall; and

end caps positioned at opposite ends of the housing, wherein each end cap comprises a respective bi-pin connector protruding from the end cap, the bi-pin connectors being compatible with a fluorescent light fixture.

20. An LED-based light comprising:

an elongate housing having longitudinal axis and a vertical axis orthogonal to the longitudinal axis, the housing defined by a base and two canted outer walls meeting opposite the base, the housing defining a cavity;

an LED circuit board on which a plurality of LEDs are located, the LED circuit board positioned within the cavity; and

end caps positioned at opposite ends of the housing, wherein each end cap comprises a respective bi-pin connector protruding from the end cap, the bi-pin connectors being compatible with a fluorescent light fixture, wherein at least one end cap comprises;

an open end to receive the housing, and

a surface opposite the open end with respect to the longitudinal axis,

wherein one of the bi-pin connectors protrudes from the surface,

wherein an upper periphery of the surface extends a first distance with respect to the longitudinal axis, and

wherein a lower periphery of the surface extends a second distance with respect to the longitudinal axis, wherein the first distance is different than the second distance.

21. An LED-based light comprising:

an elongate housing having longitudinal axis and a vertical axis orthogonal to the longitudinal axis, the housing defined by a base and two canted outer walls meeting opposite the base, the housing defining a cavity;

an LED circuit board on which a plurality of LEDs are located, the LED circuit board positioned within the cavity; and

end caps positioned at opposite ends of the housing, wherein each end cap comprises a respective bi-pin connector protruding from the end cap, the bi-pin connectors being compatible with a fluorescent light fixture, wherein the at least one end cap comprises;

an open end to receive the housing, and

a surface opposite the open end,

wherein one of the bi-pin connectors protrudes from the surface at a first point,

wherein a second point along a periphery of the surface is disposed a first longitudinal distance from the first point, and

wherein a third point along a periphery of the surface is disposed a second longitudinal distance from the first point, wherein the first distance is greater than the second distance.